Water temperatures
Temperatures must be input
or calculated for Julian Days ranging from day 0 to 364. Day 0 is Dec.
31 and Day 1 is January 1. Temperatures are in Celsius. You can
Modify temperatures by mixing
these methods for flexible control. There are several ways to generate
a water temperature profile. The three different methods are controlled
by radio buttons named:
Calculate Temperatures
method
You are free to enter any
parameters you choose in this flexible sinusoidal model. On the web page,
each of the parameter names is followed by "temp" For example the parameter
cctemp
on the web page is the
cc parameter in the equation:
For the Methow River, temperatures
are generated according to a US Fish and Wildlife model. Temperature records
have been collected at a number of sites along the Methow for several years
by different agencies including the US Geological Service, the US Fish
and Wildlife Service, and Winthrop National Fish Hatchery (Mullan 1992).
Mullan uses a general harmonic function to model river temperature in the
Methow River of the form:
-
elev = elevation in meters
-
t = time in days Julian day, January
1 = 1
-
b0 = 12.25 with b1 and elevation, creates
mean temperature
-
b1 = -0.009
-
b2 = 13.0323
-
b3 = -0.016
-
b4 = 248 phase shift
-
cc = 2 pi /365 converts days to
radians
The alterable parameters that appear on the web page have got "temp" postpended to indicate that they are for calculating temperatures. If you simply choose the Calculate
Temperatures button you will automatically generate the temperature profile
for the Spring Chinook Index spawning area in the Methow River.
Upload Temperatures method
Designate a file to upload
with temperatures. The requirements for the format are the same as for
the Input Temperatures method.
Input Temperatures method
You can type in or copy and
paste temperatures into the Input Temperatures text-area. The following
are required for creating the temperature profile:
-
Each line should have a Julian day and a temperature.
E.g. "32 2.7" indicates that on February 1, the temperature was 2.7 degrees
Celsius.
-
Missing values are interpolated between days
supplied.
-
If day 0 and day 364 are not included, the
first and last days of the series are used, respectively.
-
Create a constant temperature environment by entering a single day and a single temperature for that day.
Modifying temperatures
Web tools for this purpose are not available in this version. See the current version of the
Egg Growth model to modify temperatures.
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Please direct questions or comments to:
Nick Beer, nick@cbr.washington.edu
Columbia Basin Research,
School of Aquatic & Fishery Sciences,
University of Washington